Exactly. And it's not for nothing that "Workers of the world, unite!" is included in the Communist Manifesto, as uniting themselves against their employers was one of the few methods of gaining leverage for 19th-century workers.
If it counts I'm more of a Libertarian kind of guy, but even so I'm wondering for how long these growing power-unbalances will be ignored by both those "in power" (corporate employers, politicians, finance people) who just seem to crave for more and more, and also by us, the "normal people", who just carry on with our lives like things have never been better.
Because at the end of it all private property is merely a social construct, and once 100, 1000, 10000 people will find it strange that their combined earnings amount to what a "capitalist" or financier earns, then, just maybe, those people will decide to put that rich guy/girl in front of a wall and shoot him/her down. It happened before (see the Bolsheviks, for example), not sure why it couldn't happen again.